Wear preventer



June 6, 1933.

G. c. BERRYMAN WEAR 'PREVENTER Filed. Jan. 13, 1930 Patented June 6 1933UNITED STATES PATENT oFricE eaovna c. nnnna'nmn,v

users 'assremnrs.

or LOS ANGELES,

cans-01mm; assieivoa, BY manor m 01 ONE-THIRD TO E. E. SMITH COMPANY, OILOB ANGELBS,

- CALIFORNIA, A. CORPORATION 01! CALIFORNIA, ONh-THIBD 'TO' WILLIAI L.

KOLAINE' AND ONE-THIRD TO BICHARD A.

roam

srnaar, sort; or L08 AHGELFB, cm-

WEAB, PBEVENTER My invention relates to a simple formof device forpreventing wear between the joints and couplings of a string of drill ppe and the casing or wall of a wellln which 5 such drill pipe is beingoperated.

' In the rotary system of well drilling, the well is bored by use of adrilling bit se-. cured on the lower end of and rotated; by

means of a shaft member in the form of a a string of drill ipe whichextends up through the bore 0 applied thereto. The string of drill pipeconsists of separate lengths of pipe secured together by couplings andby tool jo nts which, owing to the fact that they progtect from thecylindrical face of the pipe, 0 en rotate in engagement with a casingset m the well or with the bare wall of the well below the casing. Thisresults in very rapid wear of the couplings andtool joints and 1 oftenwears, holes in the casing of the well through which water may leak,which holes are very diilicult to locate and cement-ofl'.

It is an object of my invention to provide a wear preventer which ma bemounted on a string of drill pipe an which has projecting engagementportions extending beyond the circumference of the tool oints orcouplings of the drill pipe so that 1n 7 event the drill pipe should beeccentric within the,well the en agement portions of the wear 'preventerwiil engage the well casing or the bare wall of the well in a manner tohold thedrill pipe, its couplings, and tool joints from wearingengagement with the casing or bare wall of the well. The engagementportions of this wear preventer are constructed ore resilient materialespe- 'cially adapted for relatively non-frictional engagement with thewell casing or wall of the well, thus reducing to amlnimum the wear onthe well casingresulting from the operation of a string of drill pipetherein. It is a further object of the invention "to i make a wearpreventer of extremely simple construction which may be veryeconomically manufactured a string of drill of wear preventer provide awear preventer inwhichthe sethe well to the surface of the ground, wherepower for rotation is rubber or rubber compounds, this body havtionshowing'a wear preventerembed and installed on 7 portions formed inconjunction with-a replaceable member and is provided with a securingmeans from which the replaceable member may be detached so that thissecuring means me be employed with numerous other .replacea le membersand need not, be discarded with the wear receiving parts of the wearpreventer.

A further object of the invention is to- A further object 01! theinvention is to provide a wear preventer having radially projecting,vertically elongated engagement to portions, between which, engagementper-i tions vertical channels exist throu h which drilling mud withinthe well may reely cir-- culate.

A further object of the invention is to provide, in a wear preventer ofthe above character, a replaceable element consisting of arelativelythin, flat, rectangular body of resilient wear-resistingmaterial, such as so ing engagement portions projecting outwardlytherefrom so that when the body is curved around the exterior of a drillpipe, the engagement portions will project radially beyond thecircumference of an adjacent tooljoint or coupling member. a i'Furtherobjects and advantages of the in-' vention will be made evidentthroughout the following part of the s ification. 4

.Referring to the drawing which is for illustrative pur oses only, pFig. 1 is a ragrnentary sectional elevamy invention in use on-a stringof drlll pipe in a well.

. Fig. 2 is a partly sectioned perspective elevation showing the wearpreventer on enlarlged scale. p v ifi. 3 is across section on" a planerepre sente by the line 3 3 of lfig. 2.

Fig. 4 is a plan View of the replaceable body forming part of the wearpreventer.

Fig. 5 is a view showing a stamped plate from which the securing meansof the wear 5 preventer is made.-

In Fig. 1 of the drawing 11 indicates a well having a casing 12 thereinthrough which a string of drill pipe 13 is extended. This drill pipe 13consists of separate lengths of pipe 14 joined together by tool jointsor by couplings, such as indicated at 15, and has a rotary drilling bit16 secured to its lower end for the purpose of penetrating the formationin which the well is being formed. On the stringof drill pipe 13adjacent to a coupling 15 I have mounted my wear preventer 17 so thatwhen the drill pipe 13 is rotating eccentrically within the well 11, thewear preventer 17 willengage the casing 12, thus holding the drill pipe13 and the coupling 15 from wearing engagement therewith, the resultbeing that they drill pipe and its connections are conserved andliability of the casing being injured is reduced to a minimum. As shownin Figs. 2 to 4, my invention includes a resilient body 20 having arelatively thin wall portion 21. This body 20 is preferably molded fromrubber or rubber compound in flat rectangular form, as shown in Fig. 4,the longitudinal edges 22 thereof being chamfered or beveled off in themanner shown in Fig. 2. The body 20 includes projecting engagementportions 23 which-consist of projecting bodies of resilient materialmolded in rectangular prismoidal form but with the upper and lower endsthereof rounded off, as indicated at 24. The engagement portions 23extend laterally or crosswise with respect to the length of the body20'so that when the body 20 is curved into cylindrical form, asindicated in Fig. 2, or around the cylindrical outer face 25 of acylindrical member, such as the pipe 14 indicated in Fig. 3, theengagement portions 23 will project radially outwardly and will extendvertically or longitudinally with respect to theclylindrical axis of thewear preventer and t e drill pipe on which the wear preventer ismounted. Although it is preferable to mold the body 20 in flat form, itwill 'be perceived that the same may be molded in cylindrical form andthen split down one side, but this practice would be more expensive thanmolding the device in flat form and would be of no material benefit tothe construction or' operation of the wear preventer. The body 20 issecured and compressed on a. cylindrical member, such as the pipe 14, bya securing means 30 which is adapted to surround the flat wall portion21of thetbody 20 and is adapted to compress same tightly against thepipe,

; there being spaces or apertures 31 in the securingmeans 30throughwhich the engagement portions 23 radially project in the mannersshown. in Figs. 2 and 3. As shown in Fig. 5, the securing means 30 ismade from a flat plate 32 of resilient metal having a width slightlyless than the body 20, having elongated openings 31 therein which areproperly spaced to correspond with the positions of the engagementportions 23 of the body 20, and having primary and secondary tongues 33and 34extending respectively from the rightward and leftward endsthereof. The tongues 33 and 34 are positioned so as to overlap, in themanner shown in Fig. 2, and are bent rearwardly along inclined lines 35and are then further bent toward each other along lines 35m to formprimary and secondary loops, as indicated at 36 in Fig. 3, the extremeends 37 of each tongue being preferably secured to the plate 32 bywelding 38 or other suitable means. Each tongue 33 and 34 being bent toform a loop, in the manner described, provides a channel or opening 40into which a tapered pin or wedge 41 may be driven, in the manner shownin Fig. 2, so as to pull the cooperating ends of the plate 32 relativelytogether and to thereby reduce the circumference of the cylinder formedby the plate 32, whereby to compress the body 20 tightly against thepipe 14. As will be seen in Fig. 2, the loops formed by the primary andsecondary tongues .33 and 34 are reduced in size or tapered downwardlyso as to conform to the shape of the wedge member 41.

As shown in Fig. 3, the edge portions 44 of the plate 32 defining theopenings 31 are turned outwardly, so that sharp edges which might cutinto the sides of the engagement portions 23 are avoided. As will befurther noted in Figs. 2 and 3, a space 46 is left between the ends ofthe body 20, in which space the loops formed on the tongues 33 and 34are received, with the result that a substantially unbroken cylindricalcontour is presented by the outer face of the plate 32. To enable readyremoval of the wedge member 41 when it is desired toremove the wearpreventer or to replace the body 20 thereof, I provide a lateral grooveor notch 48 near the upper end thereof, which may be engaged by a chiselor similar instrument through whlch the blows of a hammer mallet may beimparted in a direction to withdraw the wedge member.

The body 20 and the securing means 30 are both of very simple form andmay be economically manufactured, but the simplicity of constructiondoes not detract from the effectiveness of the wear preventer. Whensecured on a ipe and constricted by use of the wedge evice hereinbeforedescribed, the wear preventer holds the wall portion "21 of the body 20tightly against the surface of the pipe so that movement of the wearpreventer on the pipe is very cf H 1,ois,o1s

fectively resisted. From the foregping desaid body on a pipe, said meansscription it has been made evidentt at when comprising a metal plateadapted to be the engagement portions 23 have become worn, t e body 20may be quickly replaced, without necessity of discardingthe framestructure by which the body 20 is held in operative position on a drillpipe.

I claim as my invention: o

1. A protector of the character described, including: a substantiallyflat body of resilient wear-resisting material having engagementportions progectin from its outer face, said body being a apte forbending around the circumference of a cylindrical member; and retainingmeans for holding said body on a pi c, said retaining means comprising ameta plate ada ted to be curved into cylindrical form an havingapertures there- 'in for projection of said engagement portions, therebeing securing devices operative between the abutting ends of said platefor drawing said ends relatively together so as a to reduce thecircumference of said retain ing means whereby to compress'said bodyagainst said cylindrical member. 2. A protector of the characterdescribed,

including: a substantially flat body ofresil-.

ient wear-resistin ment portions pro ecting from its outer face, saidbody being adapted for bending around the circumference of a cylindricalmember;

and retaining means for holding said body on a pipe, said retainingmeans comprising a metal plate ada ted to be curved into cylindricalform an having apertures therein for projection of said engagementportions,

there being overlapping parts formed on the abutting ends of said plateadapted to receive a tapered member for securing same in cylindricalform.

3. A protector of. the character described, including: a substantiallyflat body of resilient wear-resisting material having engagementportions pro ectin from its outer face,

said body being adap'te for bending around the circumference of acylindrical member;

, there being overlapping and retaining means for holding said body ona' pipe, .saidretaining means comprising a metal plate ,ada ted to becurved into cy lindricalform an having apertures therein for projectionof said engagement portions, parts formed on the abutting ends of saidreceive a tapered. member ordrawing said ends relatively together so asto reduce the circumference of said. retaining means whereby to compresssaid body against said 1 cylindrical member.-

4. A protector of the character described, including: a substantiallyflat body of resilient wear-resisting material having enface-,1 saidortions projecting from its outer y being adapted for bending around thecircumference of a cylindrical member; and retaining means forholding'gagement cylindrical member.

material having engageagainst said cylin 7. A protector of the characterdescribed,

late adapted to curved into cylindrical form and having aperturestherein for projection of said engagement portions, there beingoverlapping to form cooperating channels adapted to receive a taperedmember for drawing said ends relatively together so as to reduce thecircumference of said whereby to compress said body against said 5. Aprotector of including: a substantially flat body of resilientwear-resisting material having engagement portions projecting from itsouter face, said body being adaptedfor bending around the circumferenceof a cylindrical member; and retaining means for holding said body on apipe, said retaining means comprising a metal plate adapted to be curvedinto cylindrical form and having apertures therein for projection ofsaid engagement portions, there being overlapping tongues projectingfrom the cooperatingends of said plate, such tongues being bent inwardlyto form tubular cooperating channels adaptedvto receive'a tapered memberfor drawing said ends relatively together so as to reduce thecircumference of said retaining means whereby to compress said bodyagainst said cylindrical member.

6. A protector of the character described, including: a cylindricallycurved body of resilient wear-resisting material adapted for placementaround a cylindrical member to be protected, said body having engagementportions projecting therefrom; and re taining means for holding saidbodyon a pipe, said retaining means comprising a.

metal plate adapted to be curved into cythe character described,-

retaining means lindrical form and having apertures therein forprojection of said engagement portions, there being securing devicesoperative between the abutting ends of said plate for drawing said endsrelatively together so as to reduce the circumference of said retainingmeans whereby to compress said body 'eal member.

including: a cylindrically curved bod of resilient wear-resistingmaterial adapte for lacement around a cylindrical memberto protected,said body having engagement portions projecting therefrom; and retainingmeans for holding said body on a pipe, said retaining means comprising ametal plate adapted to be curved into cylindrical form and havingapertures therein forprojection of said engagement portions, there beingoverlapping tongues projecting from the coo erating'ends of said plate,such tongues ing bent. inwardly to form tubular cooperating channelsadapted to receive 1 a tapered member for drawing said ends relativelytogether so as to reduce the cir cumference of said retaining meanswhereby to compress said body against said cylindrical member.

In testimony whereof, I have hereunto setmy hand at Los Angeles,California, this 7th day of January, 1930.

GROV ER C. BERRYMAN.

